I don't have Fritz 13 but I recently picked up a copy of Fritz 10 on the cheap. I think that you have encountered Fritz's training mode. When you analyze a game with Fritz you can tell it to insert training annotations. When you step up to that position you are supposed to make the correct move, something like the tactics trainer on this site.
Fritz 13 issues

You're right...I made the move I made in the game and it continued....how in the heck did that happen? LOL thanks chrka, you're a life saver!

When you initiate the analysis there might be a checkbox that says "Training" or something like that. Make sure that it is unchecked and you should be good to go. Glad to have helped!

Yep, that was it. I unchecked it. I wanted to see how Fritz scored a move I made that I thought was quite nice and prevented a perpetual check draw and allowed me to win on time :)

When you press full analyze you get this popup window. Uncheck training as shown here:
Btw, this is a really cool feature to use with games from higher ranked players (or even your own). This training option will let Fritz create puzzles for you.

Thanks Wilbert_78! It is a pretty cool feature...I'm still working my way through Fritz, it's kind of complicated, but once you kno where to go, it gets easier.

Best advice I can give you is to read the manual. I am also still learning to use it and found the manual of great value.

Thanks...I'm trying ot find it, I guess it doesn't install with the DVD.
Any rate here's my first analysis with Fritz 13
http://www.chess.com/blog/JoeHempel1/first-time-using-fritz-analysis
Have any of you figured out how to delete the training questions if we don't want them anymore? Other than deleting all commentary, of course.
Just wondering if anyone has run into this problem before.
I opened a PGN file that I played on ICC, and had Fritz start an analysis, using full analysis for both players.
It analyzes the entire game. However after move 27 and move 22 there are three asterisks inserted into the move window.
After the analysis it only shows up to the asterisks.
As it moves backwards, the last set of asterisks were at move 22 so it only goes to there, and no further.
I even went so far as to enter the moves manually, and it stopped at the same places.
Anyone know what could be going on?
Here are a couple screen shots...one during the analysis and one after: