yes, all false positives, check the disclaimer:
the problem is in heuristic scans which is common now with most antiviruses. those scans don't really scan any upx binaries so they don't know what they really do and the antiv devs decided if we can't scan it then it's a virus. this is a very dumb way of handling scans as it caused serious damages to system files which they couldn't properly determine-like the mcafee svchost scandal
many programs suffer from this problem
if it still makes you uneasy, just delete the compiled binaries and compile the source using the autoit compiler and make sure to cpmpile without any compression, otherwise the antivirus will still flag your manually compiled binary.
the catch is, uncompiled binaries are more than double the size of upx