Right now the sefirat-ha-omer tag is used for both the mitzva deorayta of counting the Omer, as well as the unrelated period of mourning that happens to coincide with these days. The two are (at least on a peshat level) completely unrelated. Perhaps they should be differentiated?
For the sake of completeness (and so people can explicitly vote this option):
One tag is sufficient; there aren't that many questions on this and we have a lot of tags already.