Stranger things with testing squad packs

I spent two of the three available attempts and both times I got into BR5 battles, although the maximum BR of this set is three. As far as I remember, in one of the recent updates, the ability to play on BR3 against BR5 was disabled.

Also, it seemed very strange to me that two of the three infantry squads in this set have the first BR, and the last one has the third. Why make such a gap? Wouldn’t it be more logical to replace the BR3 Dolganov SMG with the BR2 Tokarev SMG from a similar set? Or replace the squads with the Arisaka rifle and the Mosin carbine '44 with the SKS and SKT?

It also seemed very strange to me that this Berlin squad on the Berlin pack of cards has the appearance of the Battle of Moscow.

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