Yes, it is ok... because the bold versions of catalogue numbers are used by labels, companies, distributors, shops in some countries as Spain. Although here some users will tell you that it is not possible.
You will see as was the trend at the time that the company information from the matrix was not entered, many people were voting the inclusion of the company information in the matrix fields as incorrect. This has probably happened here which would explain the omission of EMI Uden/NL and Mediamotion respectively - it also might explain why the moulded mother/son information has been omitted which. Of course they might not actually be printed on the release (unlikely - particularly with respect to the mother.son information).
I think it needs to be checked - this affects variant 3 as well, so that;s 1, 3 and 5 with variant 5 betrayed by using a mediamotion SID code which was never used by EMI Uden afaict.