I apologize, as I missed that you had correctly tagged BLS-2015. However, the version number that you mention in your response dates back all the way to just after 2014 Labor Day. BLS provides updates many times at no charge with the same top version number (all BLS-2015 are 27.##.##, BLS-2016 28.##.##, and so on).
You haven't said how you inserted the roll-off...did you do it at the end of the schedule? In BLS-2015 (and older), you would instead have to manually do the following (detailed below because I don't know what your steps were):
1. In Rules, General Rules tab: You would have to increase the number of weeks bowled by one. That's because BLS-2015 would need a separate "week" to account for the scores bowled in the roll off.
2. In Rules, Split Season tab: You would have to change each of your splits (quarters) to begin with weeks 1, 9, 18, 26 (instead of 1, 9, 17, 25 because week 17 would be the roll-off). Change the date for week 17 to be the same as week 16.
3. In the Lane Assignments screen, you would make week 17 "USBC Roll Off - Scores Count". Then, once in week 17, you would use the Reset/Fix Dates button to the right to automatically adjust the dates for weeks 18-33 back to what weeks 17-32 were. However, once in the third quarter, your league's week numbers will be numbered one higher than they previously were.
4. After week 16 is bowled and a tie found to have occurred after that week, you would advance to week 17. You could, in the Lane Assignments screen, modify the lane assignments to put the two teams against each other on the lanes bowled, and then enter the one-game scores for the bowlers of those two teams only as usual, after which you would do the normal things after week 16 would be bowled.
I have a hunch that you inserted the roll off, but that you have it inserted at the end of the schedule (week 33?)...you would really have to do it essentially similar to how I described it above so that the roll-off fits into the schedule in sequence.
I am not employed by CDE Software; I am only a user like yourself, but I strongly urge you to upgrade to BLS-2016. The up-charge is only $29 and the ability to insert a tie breaker is but one of the many new features introduced for this season. By inserting that in the manner I described in my initial response above (again, only possible in BLS-2016), week 17 will remain as the first week of your third quarter, and you'd have the week numbers numbered as originally presented, rather than have to tell the league members that week 24 won't be the end of the third quarter, but week 25 instead would be, and so on.
To get BLS-2016 at the $29 rate, you would have to include (and be) the name/organization for the BLS-2015 license, as it can only be upgraded to the same user, per the terms of the software license. The entire process is done on-line; you would be provided with a temporary license key that you can insert into BLS-2016, which you can then download from the CDE website and use immediately, after which you would receive your own permanent code in a few days.
If I am way off, please let me know...I can only respond based on what's presented, often I need to ask questions about how something was attempted, or advise based on general assumptions (like I did when I guessed your league to be 32 weeks, 8 weeks each quarter...the numbers made sense to me). Meanwhile, please get into a routine to check for updates. CDE Software has a page on Facebook where downloadable updates are posted, although you don't necessarily have to download/install every single update.
Always check, download, and install the most recent update of your software to ensure that issues may have been corrected.