Difficulites with plurals

I dont think the dictionary consistently indicates plurals of compound nouns and presents some noncompound nouns incorrectly. For instance, the entry for "die Fahrkarte" doesnt indicate a plural. One might believe this means the plural is the same if they dont know that "die Karte" is the base noun and that by looking that up you can find the plural "die Karten" and figure that "die Fahrkarten" is the plural of the first word. This one is fairly clear while others -- at least to me -- are not so clear.

Also, all nouns Ive encountered in which the plural is obtained by adding only an ¨ are presented incorrectly. The ¨ is placed over the wrong vowel. The pronunciation key indicates the correct pronunciation, but it doesnt match the presentation. For instance the dictionary provides "die Tochtër" as the plural of "die Tochter" and "die Brudër" for "der Bruder". I dont believe ë exists in German (could be wrong!), and I think the proper plurals are "die Töchter" and "die Brüder".

Some significant errors considering the price of the product and its generally anticipated function -- to support those learning a language or who dont know it well.

Nahoa about Collins German-English