As pointed out by Joonas, it is VERY important to give the relevant/full quotes (at least, in these cases). Otherwise, the poster can receive contradictory feedback. For example, Joonas answered as Cicero would probably did. Indeed, in Classical Latin the only interpretation/analysis of the first example is the one given by Joonas. However, it is the case that the construction haec consideranda veniunt is typical of the Latin written in Early Modern Europe (e.g., cf. The Roles of Latin in Early Modern Europe), where the verb venire can be used as a sort of auxiliary verb with the gerundive consideranda, which is analyzed, like in Late Latin, as a future passive participle ('these things should be taken into account').
As for the second example, I agree with Joonas: the verb habere is used as an auxiliary verb in a compound form with a participle (datum), like in Romance languages (e.g., Cat. 'haver donat'; cf. Lat. dedisse).