I've been looking at a sample of your tweets from the 11th of January and the numbers seem to match up (mostly) in our records. I can't say for sure, because Twitter indicates 100+ and not an exact number.
Please also be aware that we only track retweets for a week after the original tweet was made, so any retweet after that date will not be recorded.
A second thing to note is that retweets might not appear because we have no data for a user that has retweeted your tweets. We try to get the records for these users immediately, but sometimes this process fails.
If this issue is still going on, please contact me at firstname.lastname@example.org so we can check your records together and in more detail.